Rotary brush



06L 1946 R. o. PETERSON ROTARY BRUSH Filed May s, 1945 3 sheets-sheet 1 v INVENTOR,

- RUBEN O.PETERSON' ATTORNEYS Oct; '15, 1946.

R. O. PETERSON ROTARY BRUSH Filed May 6, 1943 3 Sheets-Sheet 2 IN V EN TOR.

RUBEN O.PETERSON ATTORNEYS Oct. 15, 1946. R.. o. PETERSON ROTARY BRUSH Filed May 6, 1943 s Sheets-Sheet 3 INVENTOR.

RUBEN 0- PETER SON wmjwwms ATTORNEYS Patented Oct. 15, 1946 Ruben 0. Peterson,

University Heights, Ohio, assignor to The Osborn Manufacturing Company, Cleveland, Ohio, at corporation of ohio Application May 6, 1943 SerialNo. 485,867:

The present improvements relating to rotary brushes-have more particular regard to brushes of this type in which several sections are assembled on a mandrel to form a cylindrical brush of desired width or axial extent.

A pointed out in my co-pending ap n Serial No. 878,547 filed February 12, 1941 (now Patent No.'2,320,384 dated June 1, 1943), it has become desirableto utilize in a brush of the foregoing type a plurality of ann lar brush sections, each comprising an annular channelform back and brush material retained therein as by a wire or like element extending around through redoubled or looped brush material. However, the mounting of such sections where, as is usually the case, they have an internal diameter substantially larger than that of the arbor on which they are carried, presents a Spe ial problem. The so-called adapter ring disclosed in the aforesaid co-pending application constitutes one satisfactory means for thus supporting and mounting the annular brush sections and for providing at the same time, as i desirable, for the proper ventilation of the assembled brush. However, such disclosed rings being fashioned of metal add considerably to the cost of the brush, and since the section including the adapter ring is usually thrown away when the brush material has. been worn down, a considerable wastage of metalis also involved.

One principal object of the present invention, accordingly, is the provision of an improved adapter for supportin annular brush sections in the manner described, which may be made of relatively inexpensive and non-critical material,

be light of weight and yet sufiiciently strong and rugged to withstand the severe service imposed.

Another important object of the invention is to provide for the direct and effective ventilation of the assembled brush sections. In this aspect, the present application constitutes a continuation in part of my above-mentioned pending application, which discloses one specific form of ventilating means, particularly suited to the construction of adapter to which said application is directed.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certain structure embodying the invention, such disclosed means con stituting, however. but one of various structural 16 Claims. (CI. 1. 1- .81)

2, forms in which the principle of the invention may be used.

In said annexed drawings:

Fig, 1 is a side elevational' view of my present improved brush section including channelform brush back andnovel form of adapter;

Fig. 2 is a sectional view on a somewhat larger scale taken on the line 2-.2 Fig. 1 showing two such sections as assembled;

3 is a developed view of a portion of the channeliorm back as viewed from the outside, i. e. looking radially inwardly as indicated by the arrow 3 on Fig. l;

Fig. 4 is a broken sectional view showing a detail of the construction of the brush section;

Fig. 5 is a transverse section thereof as indicated by the line 5-95 Fig. 4,;

Fig. 6 is a side elevation of a modified construction of brush embodying my present im.-' provements, more particularly those for ventilate ing he brush? Fig, 7 is a sectional view of such modified construction, the plane of the section being indigated. by the line 'l- Fi 6;

Fig. 8 is a perspective view of the brush section proper which in this constructiontakes the form of a helix instead of an annular section;

Fig. 9 is a side elevation on a larger scale of a portion of such brush section;

Fig. 10 is a transverse section likewise on a la ger cale Showing several convolutions of the b u h b se in juxtapo ed re a i n;

11 is a side elevation of still another mod.- ified' construction of brush embodying certain of my p e nt improvements; and

F g. is a se tion ther of, the p a e of the section being indicated by the line I ,2l 2 Fig. 11.

previously indicated, the brush element of the com nen e t ons of wh c on s o n in side elevation in Fig. 2 and two are shown in assembled relation in the cross-sectional view of Fig. 2 comprises a channelform base I in which the brush material 2 is held by any suitable means. Such brush material may be composed of wire drawn to desired degree of fineness, tampico; or any other material usually employed for the purpose. As illustrated, means for retaining the brush material in the channelform back comprise a wire 3 which encircles the back, passing through the redoubled or looped brush material, which is disposed to form a substantially continuous or uninterrupted layer or strip, while he id alls o the ann extend a v ,adially outwardly, beyond such retaining wire or equivalent element.

depth at such outer edge so that the outer portions thereof converge beyond the wire 3, or equivalent brush material member. Accordingly these depressed areas assist in clamping said member and brush material within the base, and further serve to prevent movement of the latter lengthwise of said base. Moreover, such depressed areas, formed in the fashion described,

serve to a degree to divide the brush material into a succession of tufts which are held against relative circumferential movement in the channelform back.

The adapter member whereby such channelform back with brush material retained therein is adapted to be mounted on an armor (shown in dotted outline in Fig. 2), may be generally described as a disk I!) which may be of laterally compressible material which has a diameter such that it snugly fits within such back. Preferably at uniformly spaced intervals the periphery of such disk is cut away to form scalloped recesses H, the latter corresponding in location with one or more (two as shown) of the depressed areas 4 of the channelform brush back seated on the disk. Furthermore, as shown in Fig. 2, the thickness of the disk In is made slightly larger than that of such back or base so that when a pluralit of sections are clamped together in the .usual manner on an arbor the adapter disks will yield, i. e. be compressed slightly, to the point where the successive backs are brought substantially into contacting relation. In the case of the two brush sections shown in Fig. 2, it should be explained that they are represented in the condition prior to such application of endwise clamping pressure.

Specifically, in the preferred construction of the disk adapters shown in the drawings,each such adapter comprises a central layer Illa of indurated fiber board or equivalent relatively hard pressed or molded composition such asused as building material, and facing layer lUb of softer composition such as ordinary composition board or heavy cardboard. Such central and facing layer which thus compose the individual disk may be secured together in any suitable manner as by means of staples l2 driven into the disk from opposite sides.

For the purpose of securing the channelform brush back onto its adapter disk, lugs or tongues M are struck up from the bottom wall of such back at opposite points thereof corresponding in location with the portions of the disk lying between successive recesses II in the periphery of the latter. These lugs or tongues incidentally to being thus struck up are bent inwardly sufficiently to interlock with the central layer Illa composing the adapter disk, the intervening portions of the facing layers leb being simply pressed inwardly so as to leave small notches l5 (see Fig. 5) which represent displaced material of such outer or facing layers.

It will be understood that instead of being of the composite or layer construction just described, th disk adapter In may be formed of.

a single piece of suitable material, having the other, the transition from one material to a more economical material is readily made. Furthermore, standardized sections can be mounted on adapters of similar design differing principally fin the material from which they are made, but

for supporting the brush rings.

thereby becoming suitable for specific purposes.

The unique conformation given the side walls of the channelback, coupled with the provision of the recesses II in the periphery of the disk adapter, permits the flow of air through such recesses when properly aligned as shown in Fig. 2 and thence radially outwardly through the corresponding depressed areas 4 in the side Wall of the channelform back.

Finally, the adapter disks, when made of compressible material as described, may be clamped together on an arbor so that there is sufiicient frictional engagement between the brush sections to rotatively interlock them all together and give all the effect of a solid cylindrical core A brush thus assembled of sections with disk adapters of fiber or composition board material will weigh substantially less than where adapter disks formed of light gauge sheet metal are used. 1

It will be understood that the adapter just described may be advantageously utilized with just a single brush section, in which case the ventilating feature is unimportant. Furthermore, by constructing such adapter of a slightly yielding material, a brush Whether made up of one or more sections mounted on such adapter may be made so as to fit snugly on an arbor of a given nominal size but varying slightly due to wear or other factors. Furthermore, such adapter, whether supporting a single section or a series of assembled sections, may be screwed directly onto a threaded arbor and provide a sufficiently secure attachment to permit the operation of a single section or multiple sections without the encumbrance of a nut or shaft projecting so as to endanger work-pieces being brushed.

The modified construction of brush illustrated in Figs. 6 to 10 inc. differs from the one just described in that a single mounting is utilized to support the brush sections instead of providing each of the latter with a separate adapter and in that the brush sections are constituted of the successive convolutions of a channelform brush base which is in the shape of a helix, instead of such section comprising backs of closed annular shape.

Referring first to the brush element proper, this, as just stated, comprises a channelform back 20 in which the brush material 2| is retained, such back being in the shape of a helix as illustrated in Fig. 8. The construction of this brush element and the method of constructing the same is substantially as described in my Patent No. 2,303,386 dated December 1, 1942, but with modifications which will now be described. As in such patent, the side walls of the channel base 20 have teeth 22 punched inwardly therefrom at spaced :intervals which are disposed transversely to the walls and in overlapping relation so as to firmly secure-in place-the retaining member 23 around which the brush material 24 is looped, At circumferentially spaced intervals such side walls areiurther formed with radial depressions '25 which correspond with the depressed areas 4 in the previously described construction of brush and which are designed to serve the same purpose, i. e. permit the flow of airoutwardly between the contiguous sections of the brush element when assembled in place as shown in Fig. '10. While normally in the manufacture of this helically shaped brush element the outer edges of the side walls of the channel base should converge inwardly, there is a tendency for such edges to spread apart due to expansion of the brush material, and in order to insure a freely open passageway between the assembled sections additional circumferentially spaced depressions 2B are formed in the outer portions of such side walls. These will be desirably located between the portions from which the teeth 22 are struck up; however, irrespective of whether they coincide in location with the depressions 25 there will be free communication with the latter due to the convergence of the side walls. In other words, just as in the-first described form of brush, depressed areas are provided which extend transversely acrossthe side walls between intermediate lands that contact when the successive convolutions which constitute thebrush sections are pressed together asassembled on the adapter or mount ing-Zl,

Such mounting, as indicated, instead of bein made up of a series of disks, one for. each brush section, here takes the form of a hollow annulus,

the bore of which is of the properdiameter to fit the arbor (not shown) which serves to drivethe brush when in use, while the outer cylindrical face of said member is of the properdiameter to receive the helical brush element just described. At circumferentially spaced intervals such outer face of supporting member 21is provided with transverse grooves or recesses 28' which provide free communication with such of the depressions 25 in the side walls of the brush sections as coincide in location with such grooves or recesses. It will be understood that the latter are sufliciently numerous and so spacedthat one or more in each side wall will thus be in communication with the transverse passageways'in the outersurface of the supporting member 21.

Furthermore, since the channelform base of the brush element is rounded at its inner corners, circumferentially extending spaces 25a will be provided between the assembled sections as shown 'bymeans of which communication isaiforded be:- tween the grooves or recesses 28 and such of the radial depressions 25 in the side walls of said bases as do not directly coincide in location. Similar circumferential vent grooves or passages will also be desirably employed with the first described form .oimy improved brush, being provided by the rounding of the lower edges of the channel base as shown in Figs. 2 and 5.

In the form illustrated, the unitary adapter or supporting member forthe helical brush base isformed out of sheet metal, alternate portions 3|] of the side walls of the annulus being extended radially outwardly to engage the assembled brush sections laterally while the intermediate portions 3| are benttransversely to form the cylindricalseat on which said brush sections are received and supported. The alternating radially and. transversely extending, portions 35. and 3| thus provided on each side of the annular support 21 are staggered in relation to each other so that a substantially continuous cylindrical seat is formed for the brush sections. The transverse grooves or recesses 28 are formed in such transversely disposed portions ill of the annular support, and the radially extending portions 30 are provided with openings 32 which coincide therei with so that recesses or grooves are freely open at both ends when the brush is assembled.

It will be understood that the annular support just described may not only be used with a helically wound brush base illustrated in connection therewith but with anassembly of annular brush sections such as utilized in the first described form of my improved brush.

In tho modified form of brush illustrated in Figs. 11 and 12 the brush proper, as in the first described form, consists of a plurality of annular bases 35 of channelform in which the brush material is retained, and the side walls of such bases will be provided with alternating depressed areas and intermediate lands just as in such first described form. In other words, the difference. in construction between the two forms resides in the construction of the adapter or support on which the brush sections are mounted.

This support, as illustrated inFigs. 11 and 12, comprises an inner tubular member 36 provided at one end with apermanently. attached or fixed flange a": and at the other end with a flange 33 which is threaded on such end so that by rotation such flange may be moved towards flange 3"! in crdert'o compress the bases 35 of the assembled brush sections therebetween. vIntermediat of the fiangess'l and 33, member 3t carries .oneor more (three as shown) disks 39, the outer diam.- eter of which approximately corresponds with the inner diameter of the brush bases 35, and secured to such outer face. is a series of radially disposed bars on which such bases are directly received and supported. In addition, the fixed flange 3*. is. provided with an integral inwardly directed rib 31a and the adjustable flange 38 with a separate inwardly directed similar rib 38a on which one or more of the corresponding outer sections of the brush are received and supported. Both of said flanges 31 and 38, together with the intermediate flanges 39, are provided with apertures il whereby freecommunication is afforded with the entire interior of the mounting or support, and from the latter with the passages formed between adjacent sections of the brush by means of the depressed areas formed in the sidewalls of their channelform bases, such as in the two previously described constructions of brush isaiforded by means of the transverse grooves or recesses.

The communicating passages thus providedin each of the above described brush constructions will ordinarily be utilized for the flow of air through the brush, such air being drawn in through the ends of the adapter and thence passing outwardly through the passageways g'just referred to. It will be understood of course that instead of aira fluid suitableior cooling or otherwise assisting in the brushing action, as cleansing and cutting fluids or abrasive bearing fluids, either liquid or gaseous, may be supplied by the samemeans. V

a It will be noted thatwhere, as in the first and second described forms of brush, the brush sections are assembled ona support or mount of general cylindrical form,-the depressedareas pros vided inthe side walls of the section bases are sufiiciently closely spaced longitudinally: thereof so as to insure that one or more of such areas will be in communication with the transverse grooves formed in the cylindrical face of such support or mount; also that by properly rounding the lower edges of the, channelform bases of the brush sections longitudinally (or circumferentially) extending passages will be provided between adjacent sections through which air or other fluid may flow from such grooves in the support or mount to such depressed areas in the side walls of the brush section bases as may not coincide in location with such grooves. In other words, the latter will communicate, in efiect, with all of such depressed areas or transverse (or radial) vents provided between the brush sections when assembled on the support or mount.

While the term annular channelform back is specifically applicable to the brush base illus trated in the first described form of my improved brush, this term may also be appropriately used to designate successive convolutions of a helically wound brush back as illustrated in the second form of such brush. It will accordingly be understood that the term in question is employed in this broader connotation in the claims which follow. The term brush section, it will be understood is likewise generally used to designate such annular, helically wound, or even a straight channelform brush back with brush material retained therein, where such section embodies the improvements defined by such claims.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the structure herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In a brush, the combination of a support having a grooved face, and laterally assembled brush sections mounted on said support-face, each section comprising a channelform back and brush material retained therein, the sides of said backs being formed with alternate depressed areas and intermediate lands, such depressed areas extending transversely the entire width of the side and being so spaced longitudinally of said side that one or more thereof will communicate with the respective grooves in said supportiace, whatever the relative position of said back thereon.

2. In a brush, the combination of a plurality of brush sections each comprising an annular channelform back and brush material retained Y therein, the sides of each such back being formed into alternate depressed areas and intermediate lands, such areas extending transversely the entire width of the side, and a support whereon such sections are mounted, said support being formed to provide ducts that extend transversely of said sections, said ducts opening to the exterior of said support and also communicating with such depressed areas in said backs.

3. In a rotary brush, the combination of a plurality of brush sections each comprising an annular channelform back and brush material retained therein, the sides of each such back being formed into alternate depressed areas'and intermediate lands, such depressed areas extending transversely the entire width of the side, and a support whereon such sections are mounted, said support being formed to provide transverse ducts that communicate with such depressed areas in said backs.

.of brush sections each comprising an annular channelform back and brush material retained therein, the sides of each such back being formed into alternate depressed areas and intermediate lands, such areas extending transversely the entire width of the side, and the lower edges of said back being formed to provide longitudinally eX- tending passages which communicate with such depressed areas, and a support whereon such sections are mounted, said support being formed to provide ducts that extend transversely of such sides and communicate with such passages.

5. In a rotary brush, the combination of a .plurality of brush sections constituted of successive convolutions of a helical channelform back having brush material retained therein, the sides of such back being formed into alternate depressed areas and intermediate lands, such depressed areas extending transversely the entire width of the side, and a support whereon such sections are mounted, said support being formed to provide transverse ducts that communicate with such depressed areas in said backs.

6. A rotary brush section comprising an annular channelform brush back and brush material retained therein, the sides of said back being formed into alternate depressed areas and intermediate lands, such depressed areas extending transversely the entire width of the side, and a disk supporting said back, said disk having its periphery recessed at points corresponding with such depressed areas.

7. A rotary brush section comprising an annular channelform brush back and brush material retained therein, the sides of said back being formed into alternate depressed areas and intermediate lands, such depressed areas on one side being located approximately opposite to such areas on the other side and such areas extending transversely the entire width of the side, and a disk supporting said back, said disk having substantially the same transverse thickness as said back and having its periphery recesssed at points corresponding with such depressed areas.

8. A rotary brush section comprising an annular channelform brush back and brush material retained therein, a disk of fiber board supporting said back, and inwardly bent tongues on said base and interlocked with said disk.

9. A rotary brush section comprising an annular channelform brush back and brush material retained therein, a disk supporting said back, said disk comprising a central layer of indurated fiber board and facing layers of softer composition, and inwardly bent tongues struck up from said base and driven into the periphery of said central disk.

10. In a rotary brush, the combination of a plurality of sections, each comprising an annular channelform back and brush material retained therein, the sides of each such back being formed into alternate depressed areas and intermediate lands, such areas extending transversely the entire Width of the side, and disks supporting said backs, respectively, such disks having their peripheries formed with aligned recesses correspending with such depressed areas in said backs.

11. In a rotary brush, the combination of a plurality ofsections, each comprising an annular ohannelform back and brush material retained therein, the sides of each such back being formed into alternate depressed areas and intermediate lands, such areas extending transversely the entire width of the side, and disks of substantially the same thickness as said backs supporting the same, respectively, such disks having their peripheries formed with aligned transverse recesses corresponding with such depressed areas in said backs.

12. In a rotary brush, the combination of a plurality of sections, each comprising an annular channelform back and brush material retained therein, the sides of each such back being formed into alternate depressed areas and intermediate lands, such areas extending-transversely the entire width of the side, and disks of laterally compressible material and slightly greater thickness than said backs supporting the same, respectively, such disks having their peripheries formed with aligned recesses corresponding with such depressed areas in said backs.

13. As a new article of manufacture, a, brush section comprising a channelform back and brush material retained therein, the sides of such back being formed into alternate depressed areas and intermediate lands, such areas extending transversely the entire width of the side, and the lower edges of said back being formed to provide longitudinally extending passages which communicate with such depressed areas when said sections are assembled side by side.

14. As a new article of manufacture, a brush section comprising a channelform back and brush material retained therein, the sides of such back being formed into alternate depressed areas and intermediate lands, such areas extending transversely the entire width of the side, and the lower edges of said back being rounded, whereby when such sections are assembled side by side passages are provided which communicate with such clepressed areas.

15. As a new article of manufacture, a brush section comprising a channelform back, 'a longitudinally extending retaining member within said back, and re-doubled brush material through which said member passes, the side walls of said back being formed into alternate depressed areas and intermediate lands, such areas serving .to clamp said retaining member and brush material in place and also serving to provide passageways between sections when assembled in juxtaposed relation, and the lower edges of said back being rounded, whereby when such sections are assembled side by side passages are provided which communicate with such depressed areas;

16. As a new article of manufacture, an annular brush section comprising a channelform back, a longitudinally extending retaining member within said back, and re-doubled brush material through which said member passes, the side walls of said back being forced into alternate depressed areas and intermediate lands, such areas serving to clamp said retaining member and brush material in place and also serving to provide radial passageways between sections when assembled in juxtaposed relation, and the lower edges of said back being rounded, whereby when such sections are assembled side by side circumferential passages are provided which communicate with such depressed areas.

RUBEN 0. PETERSON. 

